Robtex

Up: 70.42.184.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 70.42.185.0/25
Down right: 70.42.185.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
70.42.185.10	PTR	www.pcworld.com
70.42.185.10	A	gamedownloads.com
70.42.185.10	A	pcw.cloud.techhive.com
70.42.185.11	A+PTR	apache0.pcworld.com
70.42.185.11	PTR	forums.pcworld.com
70.42.185.11	A	maint.gamepro.com
70.42.185.15	A	ftp.pcworld.com
70.42.185.18	A	staging.pcworld.com
70.42.185.29	A	ns1.pcworld.com
70.42.185.30	A+PTR	ns.pcworld.com
70.42.185.30	A	ns0.pcworld.com
70.42.185.31	A+PTR	mta1.pcworld.com
70.42.185.32	A	mta2.pcworld.com
70.42.185.40	PTR	lm.pcworld.com
70.42.185.50	A	cms-images.idgesg.net
70.42.185.50	A	gate.usw.idgesg.net
70.42.185.50	A	gate.idgesg.net
70.42.185.51	PTR	www.blogfaction.com
70.42.185.51	PTR	www.gamepro.com
70.42.185.51	PTR	www.gamerhelp.com
70.42.185.57	A	dev.sucksorrules.com
70.42.185.60	A	www.techhive.com
70.42.185.60	A	www.cloud.techhive.com
70.42.185.60	A	wearablog.com
70.42.185.90	PTR	newsletters.macworld.com
70.42.185.101	A	static.usw.idgesg.net
70.42.185.101	A	pixel.staticworld.net
70.42.185.101	A	csmb-origin.staticworld.net
70.42.185.102	A	origin.networkworld.com
70.42.185.102	A	sharkbait.computerworld.com
70.42.185.102	A	m.infoworld.com
70.42.185.141	A	convergeyourbranch.com
70.42.185.141	A	enterprisingcio.com
70.42.185.141	A	strategicdatacenter.com
70.42.185.142	A	zones.computerworld.com
70.42.185.142	A	solutioncenters.infoworld.com
70.42.185.142	A	spotlights.infoworld.com
70.42.185.143	A	reg.idgenterprise.com
70.42.185.145	A	resources.greenbot.com
70.42.185.145	A	resources.idgenterprise.com
70.42.185.145	A	resources.javaworld.com
70.42.185.206	A	gp-mta1.gamepro.com
70.42.185.230	PTR	playlistmag.com
70.42.185.230	A+PTR	forums.maccentral.com
70.42.185.230	PTR	www.maccentral.com
70.42.185.232	PTR	www.macuser.com